Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1c24d23b9c95cb…

MALICIOUS

PDF

80.2 KB Created: 2021-09-19 04:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ba30f0e9ed1fe19cff9a0c63e323232b SHA-1: 3963ff8ac24c5a262b56f472a999f2d39db33122 SHA-256: 9e1c24d23b9c95cb6ea4a4ef7f5e67d596c851e7f2719e8f5dd82d9da63aab0a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute malicious files. The presence of a 'download button' heuristic further supports this, indicating a lure for users to download content. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/161449fd5dc973---ronevulag.pdf
    • http://rayanchem.com/d/files/famodanumebirexejepela.pdf
    • http://blueleaves.ru/userfiles/file/bibelixizebulu.pdf
    • http://mkconline.com/landmark/ckfinder/userfiles/files/44671026697.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140b9721110a---lavoti.pdf
    • https://menu2uplus.com/images/file/befunalivikuni.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16141d9733cad5---tasebosujabatopu.pdf
    • http://mtsp.by/userfiles/files/93405326539.pdf
    • http://studioaeditecne.it/userfiles/file/41708673916.pdf
    • http://infoguard.ru/content/file/fevujep.pdf
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/limigenufuta.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/10b7561122262917007604cfa2480152/79143643598.pdf
    • http://synowka.pl/galeria/file/85566195156.pdf
    • https://cottingham-group.com/cufiles/files/61618548333.pdf
    • https://balbok.net/admin/ckfinder/userfiles/files/bunikenabulezawu.pdf
    • https://damsindia.org/admin/uploads/file/96867160902.pdf
    • https://ntpuvoice.com/ckfinder/userfiles/files/80419060675.pdf
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/55648434018.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16142e483f0647---60650668083.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=expressvpn+mod+apk+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E6 16792 bytes
font_01_sfnt_off0000edfd.bin
faa9593596fb9d60d56384032ec0b3193b64f1cb9cb67c51d6e0440807d911ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFD 10692 bytes
font_02_sfnt_off0001068a.bin
a7f706bf3afe67a54530c454f8708ec9d0ff7568f8780e94b862bf12c27f3c8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1068A 17652 bytes

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